A Cross-Linked Gel Polymer Electrolyte Composed of PEGDA and Acrylonitrile for High-Voltage Lithium Metal Batteries

Poly(ethylene glycol) diacrylate (PEGDA)-based gel polymer electrolytes (GPEs) offer several advantages for high-voltage lithium metal batteries (LMBs). However, the limited Li + transport capability hinders the wide application of PEGDA. A cross-linked GPE consisting of PEGDA and acrylonitrile (AN)...

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Bibliographic Details
Published in:Journal of electronic materials 2024-04, Vol.53 (7), p.3450-3459
Main Authors: Yuan, Jundong, Ren, Gaoya, Yang, Yefeng, Shen, Shenghui, Yao, Zhujun
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Copolymers
Crosslinking
Electrolytes
Electrolytic cells
Electronics and Microelectronics
High voltages
High-Energy Battery Materials
Instrumentation
Ion currents
Lithium
Lithium batteries
Materials Science
Optical and Electronic Materials
Polyethylene glycol
Polymers
Solid State Physics
Topical Collection: High-Energy Battery Materials
Citations: Items that this one cites
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Summary:Poly(ethylene glycol) diacrylate (PEGDA)-based gel polymer electrolytes (GPEs) offer several advantages for high-voltage lithium metal batteries (LMBs). However, the limited Li + transport capability hinders the wide application of PEGDA. A cross-linked GPE consisting of PEGDA and acrylonitrile (AN) (designated as PA11 electrolyte) is synthesized through molecular design to investigate the impact of AN incorporation on the PEGDA-based GPE. AN exhibits good compatibility with PEGDA, and the resulting cross-linked copolymer effectively reduces the crystallinity of GPE, thereby enhancing its Li + transport capability. At 25°C, the PA11 electrolyte exhibits high ionic conductivity (2.04 × 10 −4 S cm −1 ), broad electrochemical window (− 0.5 V to 5.32 V versus Li + /Li), and good stability towards lithium metal showing stable deposition and stripping of lithium for 1000 h. Additionally, LFP||Li cells assembled with designed PA11 electrolyte demonstrate discharge capacities of 150.4 mA h g −1 at 0.05 C and 122.9 mA h g −1 at 0.5 C. Moreover, the PA11 electrolyte can be applied in LMFP-based high-voltage LMBs with a capacity retention ratio of 84.9% after 20 cycles. Graphical Abstract
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-024-11096-8